Structural Changes of Silica Mesocellular Foam Supported Amine-Functionalized CO₂ Adsorbents Upon Exposure to Steam

Abstract

Three classes of amine-functionalized mesocellular foam (MCF) materials are prepared and evaluated as CO(2) adsorbents. The stability of the adsorbents under steam/air and steam/nitrogen conditions is investigated using a Parr autoclave reactor to simulate, in an accelerated manner, the exposure that such adsorbents will see under steam stripping regeneration conditions at various temperatures. The CO(2) capacity and organic content of all adsorbents decrease after steam treatment under both steam/air and steam/nitrogen conditions, primarily due to structural collapse of the MCF framework, but with additional contributions likely associated with amine degradation during treatment under harsh conditions. Treatment with steam/air is found to have stronger effect on the CO(2) capacity of the adsorbents compared to steam/nitrogen.

Poly(L‐lysine) Brush–Mesoporous Silica Hybrid Material as a Biomolecule‐Based Adsorbent for CO2 Capture from Simulated Flue Gas and Air

“…PEI-SBA-15 and DMA-SBA-15 were prepared according to the previous reports. [27,28] Characterization: Powder XRD patterns were collected on an M03X-HF (Bruker AXS) with Cu Ka radiation. Fourier transform infrared (FT-IR) spectroscopy was performed by using a Magna-IR 560 (Nicolet Instrument).…”

“…In particular, this class of amine adsorbents has been shown to be stable over hundreds of cycles in humid conditions, [23] although other recent results showed that such materials were less stable than class 1 adsorbents upon exposure to steam. [27,28] The disadvantage of class 2 adsorbents is that they often contain a smaller amount of amines than other classes. Combining the advantages of the aforementioned classes of materials, Jones and co-workers reported the first study of class 3 materials for CO 2 capture.…”

Shaping amine-based solid CO2 adsorbents: Effects of pelletization pressure on the physical and chemical properties

“…Silica-and alumina-supported amine adsorbents were synthesized according to procedures reported in previous papers from our group [25,26]. A commercial silica support (PD-09024 from PQ Corporation) as well as laboratory prepared SBA-15 [27] and γ-alumina [25] were used as support materials.…”

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

“…Thus, it is essential to control the morphology of MCF materials to extend their industrial applications. Nowadays, the MCF-type catalysts are at he research hotspot owing to their potential utilizations, for example, catalysis, [42] adsorption, [43] separation, [41] and enzymei mmobilization. [39] However,t ot he besto f our knowledge,t here are almost no reports on the application of MCF-type catalysts in the hydrotreatment process of heavy oil reactionw ith large molecules, for example, the HDS reactions of DBT and alkyl-substituted dibenzothiophene derivatives.…”